Kaguya laughed along with him while the brush was safely away, venting her built-up tickle giggles along with it. She needed to do that, since breasts like her jiggled quite a lot from laughter. And she wanted to keep still, since it was keeping him so happy.

"Take your time. They're not going anywhere~" She watched him work, as much as she could when she could only clearly see a third of what he could, managing to keep her boobs still as he did.